Battery Insulating Part with Endothermic Dehydration Particles
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Solution Overview
Problem
Batteries face issues with degradation of characteristics and insufficient heat dissipation, leading to safety concerns due to potential short circuits and temperature rise, especially with the use of simple exterior packs that lack robustness.
Innovation Solution
Incorporating a particle-containing insulating part between the positive and negative electrodes, comprising particles capable of undergoing an endothermic dehydration reaction and having a flat shape with an aspect ratio of 2/1 or more, which enhances heat dissipation and prevents degradation by absorbing heat and maintaining electrical insulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If simple exterior packs are used to reduce device complexity, then manufacturing cost and device simplicity improve, but heat dissipation capability and safety deteriorate
Solution Approach 1:
A particle-containing insulating part is introduced as an intermediary component between the positive and negative electrodes. This insulating part contains particles with high heat capacity that act as a thermal mediator, absorbing excess heat generated during battery operation and preventing thermal runaway, while maintaining the simplicity of the exterior pack structure.
Solution Approach 2:
The insulating part containing particles with high heat capacity converts the harmful effect of heat generation into a beneficial thermal management mechanism. The particles absorb excess heat through endothermic reactions, transforming the heat problem into a controlled thermal response that enhances safety without requiring complex cooling systems.
2Temperature
If particle-containing insulating part with high heat capacity particles is added to improve heat dissipation, then temperature control improves, but device complexity increases
Solution Approach 1:
The particle-containing insulating part serves multiple functions simultaneously: it provides electrical insulation between electrodes, manages heat through high heat capacity particles, and prevents short circuits. This multi-functionality allows the battery to achieve improved thermal management without adding separate dedicated components for each function, thereby limiting the increase in device complexity.
Solution Approach 2:
The insulating part combines multiple protective functions into a single integrated component. Rather than adding separate insulation layers, thermal management systems, and short-circuit prevention mechanisms, the invention merges these functions into one particle-containing insulating part that performs all three roles concurrently.
3Reliability
If ceramic coating is applied to electrode surface to prevent short circuit, then safety improves, but manufacturing complexity and cost increase
Solution Approach 1:
Instead of applying ceramic coating directly to the electrode surfaces, the invention extracts the protective function and implements it through a separate particle-containing insulating part. This approach avoids the complex and costly ceramic coating process while achieving the same short-circuit prevention effect through a simpler manufacturing method.
Solution Approach 2:
The particle-containing insulating part uses relatively inexpensive particles (such as metal oxides or ceramic particles) that can be easily incorporated into the battery structure. These particles provide effective protection without requiring the expensive and complex ceramic coating process, representing a more cost-effective and manufacturable solution.
4Temperature
If nonaqueous electrolyte with dispersed ceramic powder is used to improve safety, then heat resistance improves, but viscosity increases and ion conductivity may deteriorate
Solution Approach 1:
Rather than dispersing ceramic powder throughout the entire nonaqueous electrolyte volume, the invention segments the ceramic particles into a separate insulating part that is positioned between electrodes. This segmentation allows the bulk electrolyte to maintain its low viscosity and high ion conductivity while the separated particle-containing part provides the necessary heat resistance and insulation functions.
Solution Approach 2:
The ceramic particles are concentrated in the insulating part located between the electrodes where heat generation and short-circuit risk are highest. This local concentration of heat-resistant particles provides maximum protective effect at the critical location without requiring uniform distribution throughout the entire electrolyte, thereby preserving the electrolyte's overall low viscosity and high ion conductivity.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution effectively prevents battery characteristic degradation, improves heat dissipation, and enhances safety by preventing short circuits and managing temperature increases, thereby ensuring stable battery performance.
Implementation Method 1
the particles are a material capable of undergoing an endothermic dehydration reaction
Data Source
AI summary
A battery includes electrodes including a positive electrode and a negative electrode; and a particle-containing insulating part that is provided between the positive electrode and the negative electrode and includes particles and a resin, wherein the particles are a material capable of undergoing an endothermic dehydration reaction and have a flat shape with an aspect ratio of 2/1 or more.